Add sources to boundary lines between Kiribati and USA/France [MR-764]

[lawrencewhatley]

The current boundary lines between Kiribati and the USA (Baker Island, Palmyra Atoll, and Jarvis Island), and Kiribati and France (French Polynesia), list a unilateral document from Kiribati as the source (https://www.marineregions.org/documents/KIR_2014_eez_outer_limits_regulations.pdf). There are now treaties between Kiribati and USA (https://www.un.org/Depts/los/LEGISLATIONANDTREATIES/PDFFILES/TREATIES/Signed_US_Kiribati_treaty_3_Areas_2013.pdf), and Kiribati and France (https://www.un.org/Depts/los/LEGISLATIONANDTREATIES/PDFFILES/TREATIES/KiribatiandFrance.pdf), which should be the sources of these boundary lines.